Parts for your 2020 Haval H6-Thermostat housing

2020 Haval H6 Thermostat Housing — Purpose, Care and Replacement

Technical documentation confirms the 2020 Haval H6 is fitted with a thermostat housing. The Haval H6 Workshop/Service Manual (Cooling System section for 2017–2020 models) details thermostat removal/installation, and the GWM/Haval Electronic Parts Catalogue lists a complete thermostat housing assembly for the 1.5T and 2.0T petrol engines. Major aftermarket parts catalogues for Australasia also show direct-fit thermostat/thermostat-housing units for this model year.

The thermostat housing on a 2020 Haval H6 isn’t just a plastic lump sitting under the bonnet, it’s the gateway that controls how coolant flows between the engine and radiator. Inside the housing lives the thermostat, which opens and closes to keep engine temperature in the sweet spot. That means better fuel economy, proper cabin heat on cold mornings, and protection against overheating when it’s scorching outside or the H6 is towing or climbing.

During regular servicing, it’s smart to treat the housing as part of the cooling system health check. Even when the thermostat itself is fine, the housing can cop a hard life from heat cycles, vibration and coolant chemistry. Common wear points are the O-ring/gasket seal and the plastic body (if equipped with a composite unit), which can warp or develop hairline cracks.

• Typical warning signs: coolant weeping around the housing seam, sweet coolant smell, low coolant level, temperature gauge swinging hot or taking ages to warm up, heater underperforming, or the radiator fan running more than usual.
• Good servicing habits: inspect the housing and nearby hoses each service, pressure-test the cooling system if a leak is suspected, and refresh coolant as per the Haval logbook with the correct spec fluid.

When replacement time comes, many owners opt to swap the whole assembly (housing, thermostat, seal) to avoid doing the job twice. Use quality parts, replace the O-ring/gasket, and torque the fasteners to spec. After refilling with manufacturer-approved coolant, bleed the system properly (heater on hot, bleed points as per the manual) to purge air pockets. A quick road test and re-check for leaks once cooled down helps lock in a drama-free result.

1. Choose OE or reputable aftermarket assemblies suitable for the 1.5T/2.0T H6 engines.
2. Clean mating surfaces, never force or over-torque plastic housings.
3. Scan for fault codes and verify stable operating temperature after the job.

Done right, a fresh thermostat housing keeps the H6 running at the right temp, day in, day out, across Aussie and Kiwi conditions.

Where is the thermostat housing on a 2020 Haval H6?

On the 1.5T and 2.0T petrol engines, the thermostat housing is mounted low on the engine near the water pump, at the end of one of the main radiator hoses. It’s typically a composite or alloy outlet with a sensor and hose connection.

Access varies with engine and trim. Removing the undertray or intake ducting can make the job easier and helps with clean coolant drainage and refilling.

What are common failure signs on the H6 thermostat housing?

Look for coolant seeping at the housing seam, crusty coolant residue, or dampness around the hose connection. Temperature swings (overheating or slow warm-up), poor heater output, or a persistent coolant smell are also clues.

If the housing is plastic, age and heat can cause warping or cracks. If metal, corrosion at the gasket surface is more common. Either way, address leaks early to avoid bigger repairs.

Should the thermostat and housing be replaced together?

Many technicians replace the housing, thermostat and seal as one assembly to restore the whole interface and avoid repeat labour. If the housing is in excellent condition and the seal faces are spotless, just the thermostat and O-ring can be done—but on higher-kilometre H6s, a complete assembly is often better value.